Designing the CryptoOracle skill

Now that we know what cryptocurrencies are and why are they are getting all the attention lately, we can design the CryptoOracle skill.

CryptoOracle will work via the following steps:

1. A user launches the skill:

Figure 5.1: Launching the CryptoOracle skill

The launch response is fetched from the Lambda and played to the user, as shown in the preceding diagram.

2. A user asks Alexa about the price of any cryptocurrency:

Figure 5.2: Querying the cryptocurrency price via the CryptoOracle skill

This request will do in the following:

• • Launch an intent to fetch the price with the cryptocurrency name as a parameter
  • The Lambda receives the intent and extracts the cryptocurrency name
  • The Lambda fetches the cryptocurrency price via the coinmarketcap API using the currency name

Note

To know more about the coinmarketcap API, navigate to https://coinmarketcap.com/.

Finally, the response from the Lambda, which contains the cryptocurrency price, is played to the user.

3. Optionally, the user...